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Bird AT-400 Antenna Tester
28
Clearing a Limit
Follow the steps below to clear either an operator defined
limit value or a trace limit. The trace will still be stored in
memory, the limit value will be erased.
y Press the MENU key.
y Press the SWEPT FREQ key.
y Press the LIMIT key.
y Press the CLEAR LIMIT key.
The value field will change to off if an operator value was
being used, the dotted outline of the limit trace will be
removed if a trace was being used.
Single Frequency
This mode is useful for tuning antennas, particularly with
the audio on. The frequency can be selected following the
instructions below.
Selecting the Frequency
y Press the MENU key.
y Press the SINGLE FREQ key.
y Press the FREQ MHZ key. The cursor will be blinking
at the frequency and Freq MHz will be highlighted.
y Enter the desired frequency using the numeric keypad
or change the value using the UP/DOWN arrow keys.
y Press the ENTER key. The measured value and the
frequency will be shown at the top of the display.